Add fields and multiple support to object selector (#147215)

* Add schema supports to object selector

* Update format

* Update homeassistant/helpers/selector.py

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

---------

Co-authored-by: G Johansson <goran.johansson@shiftit.se>

homeassistant/helpers/selector.py

@@ -1117,9 +1117,23 @@ class NumberSelector(Selector[NumberSelectorConfig]):
         return value
 
 
+class ObjectSelectorField(TypedDict):
+    """Class to represent an object selector fields dict."""
+
+    label: str
+    required: bool
+    selector: dict[str, Any]
+
+
 class ObjectSelectorConfig(BaseSelectorConfig):
     """Class to represent an object selector config."""
 
+    fields: dict[str, ObjectSelectorField]
+    multiple: bool
+    label_field: str
+    description_field: bool
+    translation_key: str
+
 
 @SELECTORS.register("object")
 class ObjectSelector(Selector[ObjectSelectorConfig]):
@@ -1127,7 +1141,21 @@ class ObjectSelector(Selector[ObjectSelectorConfig]):
 
     selector_type = "object"
 
-    CONFIG_SCHEMA = BASE_SELECTOR_CONFIG_SCHEMA
+    CONFIG_SCHEMA = BASE_SELECTOR_CONFIG_SCHEMA.extend(
+        {
+            vol.Optional("fields"): {
+                str: {
+                    vol.Required("selector"): dict,
+                    vol.Optional("required"): bool,
+                    vol.Optional("label"): str,
+                }
+            },
+            vol.Optional("multiple", default=False): bool,
+            vol.Optional("label_field"): str,
+            vol.Optional("description_field"): str,
+            vol.Optional("translation_key"): str,
+        }
+    )
 
     def __init__(self, config: ObjectSelectorConfig | None = None) -> None:
         """Instantiate a selector."""